Risk Per Trade

Risk per trade is the predefined maximum loss a trader accepts on a single position, typically calculated as a fixed percentage of total account equity (for example, 1%). It is the dollar (or base-currency) amount the trader expects to forfeit if the trade reaches its stop-loss level. Because it is recalculated against current equity, the absolute amount risked scales up as the account grows and down as it shrinks, keeping exposure proportional to capital. Risk per trade is the input that drives position sizing: the number of shares, contracts, lots, or units is derived by dividing the risk amount by the distance between the entry price and the stop-loss price. It also forms the basis of "R-multiple" performance tracking, where one unit of risk equals 1R and outcomes are measured in multiples of that unit (for example, a winner that returns three times the risk is a +3R trade). Risk per trade sits at the centre of money management because it determines how many consecutive losses an account can absorb before serious drawdown occurs.

In plain English — Risk per trade is one of the simplest yet most overlooked ideas in trading. Instead of asking "how many shares or contracts should I buy?", it flips the question to "how much am I willing to lose if this trade goes wrong?" That loss amount is decided in advance, before the trade is even placed. Most traders express this as a percentage of their account rather than a fixed dollar figure. A common educational convention is to cap the loss on any one position at around 1% of the account, though some use 0.5% and others go up to 2%. The point is consistency: the same small slice of capital is at stake on every trade, win or lose. The reason it is measured as a percentage is that it adapts automatically. When the account grows, the dollar amount risked grows with it; when the account shrinks after losses, the dollars at stake shrink too, which slows the bleeding during a bad streak. This is what keeps a string of losing trades from wiping an account out. Crucially, risk per trade is not the same as the size of the position. With a tight stop-loss, you can hold a fairly large position while still only risking a small percentage of the account, because the price only has to move a little before you exit. The risk figure is driven by the distance to your stop-loss, not by how much money you commit up front.

Suppose a trader has a $20,000 account and uses a risk-per-trade limit of 1%. That means the most they will accept losing on this single trade is $20,000 x 1% = $200 (this is their 1R). They want to buy a stock trading at $50.00 and decide that if it falls to $48.00, their idea is wrong and they will exit. The risk per share is the distance from entry to stop: $50.00 - $48.00 = $2.00. To find the position size, they divide the dollar risk by the per-share risk: $200 / $2.00 = 100 shares. So they buy 100 shares. Notice the position itself is worth 100 x $50 = $5,000, which is 25% of the account, yet the actual risk is still only $200 (1%), because the stop is just $2 away. If the stop is hit, they lose $200 and the account becomes $19,800. On the next trade, 1% is recalculated against the new balance ($198). If instead the stock rises to $54 and they exit, the gain is 100 x $4 = $400, or +2R (twice the amount they risked). This is illustrative only and not a recommendation to trade any instrument.